Citazione Stile APA (7a Edizione)

Richards, J. C., & Hull, J. P. (1997). Interchange: English for international communication: teacher's manual. 1.

Citazione stile Chigago Style (17a edizione)

Richards, Jack C., e Jonathan Proctor Hull. Interchange: English for International Communication: Teacher's Manual. 1. Cambridge, 1997.

Citatione MLA (9a ed.)

Richards, Jack C., e Jonathan Proctor Hull. Interchange: English for International Communication: Teacher's Manual. 1. 1997.